Qualla: Petrified Forest, Khorixas

Petrified Forest, Khorixas: Introduction

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Olga Ernst, CC BY-SA 4.0. Run your hand along the bark and your fingers expect wood. They find stone. The trunk lying half-buried in the red gravel west of Khorixas has every detail a living tree would have - the grain, the rings, the knots where branches once grew - but it weighs as much as rock because that is exactly what it has become. These trees fell roughly 280 million years ago, long before the dinosaurs, when this corner of Namibia was part of the supercontinent Gondwana. They have outlasted the very landmass they grew on.

Image: Olga Ernst | CC BY-SA 4.0

Petrified Forest, Khorixas: Trees That Travelled Here

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit CC BY-SA 3.0. The first surprise is that these trees never grew where they now lie. They were carried here. Geologists believe a massive flood - likely meltwater from a retreating Gondwana ice age - ripped the trunks from forests far upstream and dumped them on a floodplain, where alluvial san...

Image: CC BY-SA 3.0

Petrified Forest, Khorixas: How Stone Replaced Wood

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Olga Ernst, CC BY-SA 4.0. Burial saved them. Sealed beneath sand, cut off from oxygen, the wood could not rot. Instead, mineral-rich groundwater seeped through the trunks cell by cell over millions of years, and silica precipitated inside each individual plant cell - a process called silicification. The r...

Image: Olga Ernst | CC BY-SA 4.0

Petrified Forest, Khorixas: A Window Into Gondwana

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit GIRAUD Patrick, CC BY 2.5. What makes these trunks so valuable is not just their age but the lost world they belong to. Roughly 280 million years ago, in the Permian period, there were no separate continents as we know them. Africa was fused with South America, Antarctica, Australia and India into the sing...

Image: GIRAUD Patrick | CC BY 2.5

Petrified Forest, Khorixas: The Living Fossil Alongside the Dead

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Willyman, CC BY-SA 4.0. Scattered among the stone logs grows something that blurs the line between living and ancient: the welwitschia. This bizarre plant produces just two leaves in its entire lifetime, which fray and split as they sprawl across the desert floor over the centuries. Welwitschias are slo...

Image: Willyman | CC BY-SA 4.0

Petrified Forest, Khorixas: A Monument in the Desert

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Sedimentaryrock, CC BY-SA 3.0. The site has been protected for generations. Namibian authorities declared the Petrified Forest a National Monument on 1 March 1950, recognising that fossils this old and this exposed could vanish into private hands or souvenir pockets without safeguards. Local guides now lead vi...

Image: Sedimentaryrock | CC BY-SA 3.0